add Carry/Borrow-less Arithmetic

[Rudxain]

Resources:

• https://maa.org/sites/default/files/pdf/upload_library/2/Applegate-2013.pdf
• https://en.wikipedia.org/wiki/Carry-less_product
• https://oeis.org/wiki/Carryless_arithmetic_base_10,_mod_10_version
• https://docs.sunscreen.tech/advanced/carryless_arithmetic.html

I should mention the implications of such an arithmetic system for modular exponentiation and matrices. Also ask questions about conjectures, such as Riemann and Collatz

[Rudxain]

I don't think this deserves to be in the wiki. I wasn't the first to define it. I should make a blogpost instead

[Rudxain]

Reopening here, because of transfer